Move a long AI conversation into a fresh chat

Paste this as the last message in the conversation that’s gotten long:

This conversation has got long and I'm starting a fresh one.
Write me a handover note I can paste into the new conversation.

Include:
- What I'm trying to produce, and who it's for
- Any rules or preferences I've given you
- Decisions we've made, and the options we ruled out
- Where we got to, and what's still open

Facts from this conversation only. Don't add advice, and don't
summarize your own explanations back to me.